Light projector



June 11, 1929.

. P. S. BAILEY LIGHT PROJECTOR Filed Dec. 8, 1927 Tnvento'r Fehcy S. Bai,ley,

by Wwr T. Hi5 Attorney.

Patented June 11, 1929.

UNITED STATES PATENT OFFICE.

PERCY S. BAILEY, OF MARBLEI-IEAD, MASSACHUSETTS, ASSIG-NOR TO GEN ERAL ELEC- TRIO COMPANY, A CORPORATION OF NEW YORK.

LIGHT PROJECTOR.

, Application filed December 8, 1927. Serial No. 238,674.

My invention relates to light projectors. More particularly it relates to that type of projector which is especially adapted for so-' called flood lighting. Among the objects of my invention is to provide an improved form of lamp support in a projector of the above character. The foregoing and other features of my invention will be more fully understood trom the following specification and claims, reference being had to the accompanying drawing inwhich Fig. 1 shows a flood. lighting projector comprising the features of the invention. In this figure the projector is shown upside down. Fig. 2 shows one of the supporting elements of the lamp of the projector ofFig. 1-.

Referring more in detail to the drawing, it will be seen that the projector comprises a casing 52, within which the usual form of reflector is located. The casing is closed by a door 3 provided with the usual lens closure 1. The casing, as shown in Fig. 1, is provided with an outwardly projectingturret This turret is provided with a lid 4 which may be clamped in closed position by means of the clamping element 5. Through this turret may be reached the lamp supporting element. This element comprises a stem 6 and a projecting arm 7 to the forward end of which there is secured in any suitable manner, as for example, by means of screws 8 and 9, the porcelain lamp base 10. To one end of the base 10 there is secured the usual threaded metal casing 11 to which the base 01. the lamp is screwed. One of the cable leads 12 itwill be seen is connected to the terminal 13 which in turn is-electrically connected with the element 11. Similarly, the cable lead 14 is connected with the central socket terminal by way of a terminal on the opposite side of the socket. As indicated in Fig. 1, the element 6 is mounted in a ball element 15 which element is clamped in position between the yoke 16 and the clamping element 17 by means of a screw 18. The ball 15 is the usual slotted type of ball which when the screw 18 is tightened tightly clamps the rod 6. In order to adjust the position of the lamp 19 with respect to the reflector within theprojector, the rod 6 may be raised or lowered by sliding in the ball 15. IVhen the proper position is found the screw 18 is tightened with the result that the rod 6 is tightened against the inside walls 01": the ball and held in position- This adjustment is done by first opening the lid 1 and then seizing the element 7 between the thumb and forefinger. The screw 18 is then loosened and the adjustment described carried out. In order to prevent the person adjusting the lamp from being shocked by coming in contact with the terminals of the lamp a shield 19 is provided. This shield has a central opening which conforms to the shape of the porcelain element 10 and is maintained in position between theledge formed about the outside of the porcelain element 10 and the projecting elements 20 on the member 7, there being one such projecting element on each side of the porcelain element 10. The projecting elements, as will be seen, are staggered, the arrangement being such that the projecting element 20 on the near side of the porcelain element is located toward the rear, that is, toward stem 6, while the element 20 on the far side of the porcelain element is toward the front. The object of this staggered arrangement is to enable the screw 9, which extends all the way through the element 10, to engage the element 20 on the far side, while the screw 8 engages the projecting-element 20 on the near side. 7

It will be observed that the shield 19 is pro vided with two openings 21, one on either side of the porcelain element 10. These openings are located in juxtaposition to the screws on the cable terminals. l/Vith this arrangement it is possible to inserta screw-driver in the opening 21 on the near side and engage the screw of the terminal 13. Similarly, by inserting a screw-driver in the opening 21 in the far side the corresponding screw and the corresponding terminal beneath this opening can be reached.

It will be understood that while I have disclosed my invention by illustrating a specific structure, I do not wish to be so limited inasmuch as I contemplate modifications of the invention within the spirit and scope of the claims.

hat I claim as new and desire to secure by Letters Patent of the United States, is,-

1. In a light projector, a reflector, a lamp, a support for the lamp for holding the latter in operative relation to the former, a casing for enclosing said elements, an opening in the casing, said support being located in juxtaposition with said opening whereby access may be had to the said support therethrough, a. bearing for the support within the casing whereby the lamp and its support may be adjusted, said lamp support comprising a rod held by said bearing, an arm extending trans verse the axis of the rod for holding said lamp, said arm serving as an element adapted to be seized manually for adjusting the lamp, and a guard element located between the arm and the lamp to prevent the hand from finding the terminals of the lamp.

2. In a light projector, a reflector, a lamp, a support for the lamp for holding the latter in operative relation to the former, a casing for enclosing said elements, an opening in the casing, said support being located in juxtaposition with said opening whereby access may be had to the said support therethrough, a bearing for the support within the casing whereby the lamp and its support may be adjusted, said lamp support comprising a rod held by said bearing, an arm extending transverse the axis of the rod for holding said lamp, said arm serving as an element adapted to be seized manually for adjusting the lamp, and a guard element located between the arm and the lamp to prevent the hand from linding the terminals of the lamp, said arm being channeled, said lamp having a porcelain base formed to fit in said channel, and means to securing said porcelain to said arm.

3. In a light projector, a reflector, a lamp, a support for the lamp for holding the latter in operative relation to the former, a casing for enclosing said elements, an opening in the casing, said support being located in j uxtaposition with said opening whereby access may be had to the said support therethrough, a bearing for the support within the casing whereby the lamp and its support may be adjusted, said lamp support comprising a rod held by said bearing, an arm extending transverse the axis of the rod for holding said lamp, said arm'serving as an element adapted to be seized manually for adjusting the lamp,

a guard element located between the arm and the lamp to prevent the hand from finding the terminals of the lamp, said arm being channeled, said lamp having a porcelain base formed to lit in said channel, and means for securing said porcelain to said arm, said porcelain base being formed to receive said guard, said guard being provided with small openings in uxtaposition to the lamp terminals whereby said terminals may be reached by means ot a tool.

l. In a light projector, a reflector, a lamp, a support for the lamp for holding the latter in operative relation to the former, a casing for enclosing said elements, an opening in the casing, said support being located in juxtaposition with said opening whereby access may be had to the said support therethrough, a bearing for the support within the casing whereby the lamp and its support may be adjusted, said lamp support comprising a rod held by said bearing, an arm extending transverse the axis of the rod for holding said lamp, said arm serving as an element adapt-- ed to be seized manually for adjusting the lamp, a guard element located between the arm and the lamp to prevent the hand from finding the terminals of the lamp, said aim being channeled, said lamp having a porcelain base formed to fit in said channel, and means for securing said porcelain to said arm, said channel being provided with ears on opposite sides, said ears being oiiset and provided with a threaded opening for receiving a screw, said porcelain being perforated at points in juxtaposition to said openings whereby the porcelain may be clamped to said ears on both sides of the channel.

In witness whereof, I have hereunto set my hand this fifth day of December, 1927.

PERCY S. BAILEY, 

